Disc harrow blade



FIG. 1 is a front perspective view of the disc harrow blade;

FIG. 2 is a rear perspective of the disc harrow blade;

FIG. 3 is a side view of the disc harrow blade;

FIG. 4 is a top view of the disc harrow blade;

FIG. 5 is a front view of the disc harrow blade;

FIG. 6 is a section side view of the disc harrow blade along 6-6 in FIG. 7; and,

FIG. 7 is an end view of the disc harrow blade. 

CLAIM The ornamental design for the disc harrow blade, as shown and described. 